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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ST20CX 데이터시트(PDF) 131 Page - STMicroelectronics |
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ST20CX 데이터시트(HTML) 131 Page - STMicroelectronics |
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131 / 212 page  move2dzero 131/212 ® move2dzero 2D block copy zero bytes Code: 25 FE Description: Copy zero valued bytes from a 2D block of memory to another, non- overlapping, area using parameters set up by move2dinit. The copy is performed using the minimum number of word reads. Areg is the number of bytes in each row, Breg is the address of the destination, and Creg is the address of the source. Definition: if ( source and destination overlap) Undefined effect else for y = 0 .. (count − 1) for x = 0 .. (Aregunsigned − 1) if (byte[Creg + (y × srcStride) + x] = 0) byte ′[Breg + (y × dstStride) + x] ← byte[Creg + (y × srcStride) + x] Areg ′← undefined Breg ′← undefined Creg ′← undefined where count = Move2dBlockLength dstStride = Move2dDestStride srcStride = Move2dSourceStride Error signals: none Comments: Secondary instruction. Instruction is interruptible. See also: move2dinit |
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